@article{gupta_singh_2014,  title={Numerical study of confinement in short concrete filled steel tube columns},  volume={11},  ISSN={1679-7825},  url={https://doi.org/10.1590/S1679-78252014000800010},  DOI={10.1590/S1679-78252014000800010},  number={8},  journal={Latin American Journal of Solids and Structures},  publisher={Individual owner},  author={Gupta, P.K. and Singh, Heaven},  year={2014},  month={Dec},  pages={1445–1462} }